NOTE: The TTI is the ratio of peak
period travel time to free-flow travel time. It expresses the average amount
of extra time it takes to travel in the peak period relative to free-flow
travel.
SOURCE: Texas A&M University,
Texas Transportation Institute, 2005 Urban Mobility Report (College Station, TX:
2005), also available at http://tti.tamu.edu/, as of May 2005.
